EP1773170B1 - Dishwasher and operating method for a dishwasher - Google Patents

Dishwasher and operating method for a dishwasher Download PDF

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Publication number
EP1773170B1
EP1773170B1 EP20050762207 EP05762207A EP1773170B1 EP 1773170 B1 EP1773170 B1 EP 1773170B1 EP 20050762207 EP20050762207 EP 20050762207 EP 05762207 A EP05762207 A EP 05762207A EP 1773170 B1 EP1773170 B1 EP 1773170B1
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EP
European Patent Office
Prior art keywords
self
dishwasher
cleaning
signal
elapsed
Prior art date
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EP20050762207
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German (de)
French (fr)
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EP1773170A1 (en
Inventor
Bjorn Brodowski
Klaus Padtberg
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Premark FEG LLC
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Premark FEG LLC
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Priority to DE200410030013 priority Critical patent/DE102004030013A1/en
Application filed by Premark FEG LLC filed Critical Premark FEG LLC
Priority to PCT/US2005/021849 priority patent/WO2006002123A1/en
Publication of EP1773170A1 publication Critical patent/EP1773170A1/en
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Publication of EP1773170B1 publication Critical patent/EP1773170B1/en
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    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00Washing or rinsing machines for crockery or tableware
    • A47L15/0089Washing or rinsing machines for crockery or tableware of small size, e.g. portable mini dishwashers for small kitchens, office kitchens, boats, recreational vehicles
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00Washing or rinsing machines for crockery or tableware
    • A47L15/0018Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0057Cleaning of machines parts, e.g. removal of deposits like lime scale or proteins from piping or tub
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00Washing or rinsing machines for crockery or tableware
    • A47L15/42Details
    • A47L15/46Devices for the automatic control of the different phases of cleaning ; Controlling devices
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2301/00Manual input in controlling methods of washing or rinsing machines for crockery or tableware, i.e. information entered by a user
    • A47L2301/04Operation mode, e.g. delicate washing, economy washing, reduced time, sterilizing, water softener regenerating, odor eliminating or service
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/20Time, e.g. elapsed operating time
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/22Number of operational cycles
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/34Other automatic detections
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/26Indication or alarm to the controlling device or to the user
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/34Change machine operation from normal operational mode into special mode, e.g. service mode, resin regeneration mode, sterilizing mode, steam mode, odour eliminating mode or special cleaning mode to clean the hydraulic circuit

Abstract

A dishwasher (2) has a detecting device (4) for sensing at least one condition indicative of need for self-cleaning of the dishwasher. The detecting device (4) emits a signal in this respect, for example, to an indicating device (6) or to a control device (8). The control device (8) is designed for executing a self-cleaning program, for controlling: a) a device for supplying self-cleaning liquid, b) a circulating pump for circulating the self-cleaning liquid in the dishwasher, for cleaning parts of the same, and c) a device for emptying the self-cleaning liquid from the dishwasher following the self-cleaning operation according to step b).

Description

    TECHNICAL FIELD
  • This application relates to a dishwasher for washing dishes and other items to be washed, for example trays or grease filters of a vapour extraction device, and to an operating method for such a dishwasher.
  • BACKGROUND
  • Dishwashers and operating methods for dishwashers are known from the art. A dishwasher may be, in particular, a commercial dishwasher. Examples of known commercial dishwashers are hand-loaded programmable machines and dishwashers with conveying systems. Hand-loaded programmable machines are typically designed for receiving one or two baskets or racks for accommodating items to be washed. Loading with items to be washed may take place for example from the front (front-loading machines) or from the side, such as for example in the case of basket push-through machines. Examples of dishwashers with a conveying system are basket conveying machines or conveyor-belt machines.
  • Dishwashers contain a washing system with a number of spray nozzles for spraying washing liquid or rinsing liquid. The washing liquid may generally contain essentially drinking water, to which a surfactant, alkaline dishwashing detergent is added. Rinsing liquid may generally contain essentially drinking water or drinking water with an added rinsing agent.
  • The spray nozzles may be provided on a movable, for example rotatable, spray arm or on a fixedly installed spray tube, depending on the type of dishwasher used. There are known dishwashers which use the same spray nozzles for spraying the rinsing liquid as are used for spraying the washing liquid. Furthermore, there are known programmable machines and conveying-system dishwashers which use separate spray nozzles for spraying the rinsing liquid and the washing liquid.
  • The washing liquid is generally in a tank which is arranged in such a way that it collects washing liquid running off the dishes and, depending on the type of dishwasher, also rinsing liquid running off the dishes. A tank screen is generally provided, to hold back large contaminants contained in the liquid running off the dishes. To save energy, the washing liquid may be partly recirculated, i.e. some of the washing liquid is used for a further load of the dishwasher.
  • Usually, of the washing system of a dishwasher, only the tank screen is regularly cleaned by the user. The rest of the washing system is rarely cleaned by the user; in particular, the spray arms are only rarely removed from the machine and cleaned by the user. The interior space of the machine is also only rarely cleaned by the user. Apart from the tank screen, the cleaning of the dishwasher is generally performed by service personnel. After lengthy use, there are also often limescale deposits in the machine, which then have to be removed by a descaling agent - usually likewise by service personnel. This procedure is labour-intensive and costly.
  • Document US-A- 2002/096 192 describes a dishwasher with a self - cleaning operation according to the preamble of claims 1 and 13.
  • It would be desirable to provide a dishwasher and an operating method for a dishwasher which make it possible in a simple and inexpensive way for the dishwasher to operate reliably for a sustained period of time and with a satisfactory level of hygiene.
  • SUMMARY
  • In one aspect, a dishwasher contains a detecting device for sensing at least one condition indicative of a need for self-cleaning of the dishwasher. On this basis, the detecting device emits a signal. If two or more such operating conditions can be sensed by the detecting device, the detecting device may be designed in such a way that it emits the signal if the at least two operating conditions exist. Alternatively, it may be designed in such a way that it emits the signal if only one of the at least two operating conditions exists.
  • The dishwasher also has a control device, for executing a self-cleaning program, that is for controlling
  1. a) a device for supplying self-cleaning liquid,
  2. b) a circulating pump for circulating the self-cleaning liquid in the dishwasher, for cleaning parts of the same, and
  3. c) a pump for pumping away the self-cleaning liquid from the dishwasher following the self-cleaning operation according to step b).
  • The signal of the detecting device makes it possible for the self-cleaning program to be executed without a user having to inspect the dishwasher to ascertain whether self-cleaning is required. This increases the user-friendliness of the dishwasher. In addition, the detecting device ensures that the self-cleaning operation is not forgotten by the user, which increases the operational reliability. Moreover, it is often only when the machine is partly dismantled that a user or service engineer can establish that self-cleaning is required. This is not necessary in the case of a dishwasher according to the invention. As a result, the servicing of the dishwasher according to the invention is also less cost-intensive than in the case of known dishwashers.
  • The dishwasher preferably has an indicating device for picking up the signal of the detecting device, the indicating device, on the basis of the signal, emitting an optical and/or acoustic signal for a user, who is thus alerted that self-cleaning of the dishwasher is required. The indicating device may be, for example, a lamp. As an alternative or in addition, the indicating device may have a display, which informs the user that self-cleaning is required. As an alternative or in addition to the optical signal, the indicating device may emit an acoustic signal, for example a continuous tone or a periodic audible signal.
  • An condition indicative of need for self-cleaning may be an operating condition such as, for example, a duration which has elapsed since the last self-cleaning operation. For this purpose, a duration which has elapsed since the last self-cleaning operation can be determined in the detecting method and the signal emitted when this duration is greater than a pre-stored duration threshold value. For example, the self-cleaning signal may be emitted every X days or every Y weeks. For this purpose, the detecting device preferably has the following elements: a real-time clock and a memory which stores the point in time of the last self-cleaning operation; a calculating device which, from the point in time of the last self-cleaning operation and a time signal from the real-time clock, calculates a duration which has elapsed since the last self-cleaning operation; a memory for storing the duration threshold value; and a time comparator by means of which the duration which has elapsed since the last self-cleaning operation is compared with the duration threshold value and the signal is emitted when the duration which has elapsed since the last self-cleaning operation is equal to or greater than the duration threshold value. The real-time clock may have its own time base, for example a quartz mechanism, or it may rely on an external time base, for example it may be designed as a radio clock which receives a time signal from an atomic clock.
  • The duration which has elapsed since the last self-cleaning operation also provides to a certain extent an indication of limescaling of the dishwasher. Recording the duration which has elapsed since the last self-cleaning operation is meaningful in particular if a washing program is carried out only rarely, for example once a day or every 2 days.
  • According to a further embodiment, the signal is emitted by the detecting device on the basis of an elapsed duration in which the dishwasher has been in operation. Then, a number of elapsed hours since the last self-cleaning operation is recorded and the signal emitted when the number of elapsed hours is greater than a pre-stored elapsed-hour threshold value. In this case, the detecting device has the following components: an elapsed-hour meter and an elapsed-hour resetter which resets the elapsed-hour meter as the self-cleaning program is executed; a memory for storing the elapsed-hour threshold value and an elapsed-hour comparator by means of which a meter reading of the elapsed-hour meter is compared with the elapsed-hour threshold value and the signal is emitted when the meter reading is equal to or greater than the elapsed-hour threshold value.
  • The signal may be emitted by the detecting device on the basis of a number of operating cycles of the dishwasher. For example, a number of washing cycles since the last self-cleaning operation may be counted in the detecting method and the signal emitted when the number of washing cycles is greater than a pre-stored cycle threshold value. For this purpose, the detecting device may comprise the following elements: a cycle meter, for counting washing-program cycles, and a cycle resetter which resets the cycle meter as the self-cleaning program is executed; a memory for storing the cycle threshold value and a cycle comparator by means of which a current value of the cycle meter is compared with the cycle threshold value and the signal is emitted when the current value of the cycle meter is equal to or greater than the cycle threshold value.
  • With the cycle meter - as also with the elapsed-hour meter - indirect sensing of contamination or limescaling is possible.
  • In a simple embodiment, it may be provided that the cycle meter is incremented by a constant value, irrespective of the type of operating cycle. This makes it possible for the operating cycle meter to be realized in a simple form. In order to increase the accuracy of detecting the necessity for a self-cleaning operation, however, it may also be provided that, with every operating cycle, the operating cycle meter is incremented by a value which depends on the type of operating cycle. For example, it may be provided that an intensive program increments the value of the operating cycle meter by twice the amount than a normal program.
  • The signal may be emitted by the detecting device on the basis of a directly sensed contamination of the dishwasher. For example, a degree of contamination of the dishwasher may be sensed in the detecting method and the signal emitted when the degree of contamination is greater than a pre-stored contamination threshold value.
  • According to one embodiment, for this purpose the detecting device comprises the following elements: at least one sensor for sensing a degree of contamination of the dishwasher, a memory for storing the contamination threshold value and a contamination comparator by means of which a current value of the degree of contamination is compared with the contamination threshold value and the signal is emitted when the current value of the degree of contamination is equal to or greater than the contamination threshold value.
  • The sensor may be any known sensor that is suitable for the purpose according to the invention. For this purpose, the sensor preferably detects a state of a component of the dishwasher that changes with the contamination. A sensor may be, in particular, an ultrasonic sensor or an optical sensor. For example, an ultrasonic sensor may measure an ultrasonic transmission property of a liquid line or a spray tube, for example, which changes with the contamination.
  • If two or more sensors are provided, the contamination comparator may compare the degree of contamination sensed by each individual sensor with a contamination threshold value assigned to this sensor. According to one embodiment, the contamination comparator is designed in such a way that it emits the signal when one of the sensors senses a degree of contamination which lies above the assigned contamination threshold value. According to another embodiment, it is provided that the contamination comparator determines an overall degree of contamination of the dishwasher from the values of all the sensors and compares it with a contamination threshold value assigned to this overall degree of contamination.
  • The direct sensing of contamination of the dishwasher is a very accurate possible way of establishing the necessity for a self-cleaning operation. The other methods referred to above in each case sense an operating state which indirectly senses the contamination of the dishwasher. Direct sensing of the contamination is more accurate then indirect sensing, but the direct method involves greater expenditure than the indirect methods.
  • Of the elements of the detecting device, in particular the real-time clock, the calculating device, the time comparator, the elapsed-hour meter, the elapsed-hour meter resetter, the elapsed-hour comparator, the cycle meter, the cycle meter resetter, the cycle comparator, the sensor device and the contamination comparator, one or more or all of the elements may contain a discrete electronic circuit, an integrated circuit and/or a microprocessor.
  • The elements of the detecting device may each be realized individually. The elements may, however, be at least partly combined in groups. For example, the real-time clock, the calculating device and the time comparator may be realized by a circuit or by a computer program or a computer program module. Alternatively, it may be provided that, as long as they do not require discrete components, all the elements are realized by a single computer program, which is run on a central microprocessor of the dishwasher.
  • Memories assigned to the elements of the detecting device, for example the memory which stores the point in time of the last self-cleaning operation, the meters or the memories for the threshold values, may be formed as separate memory elements. Alternatively, it may be provided that these memories are memory cells of a higher-level memory, for example of a memory assigned to the central microprocessor.
  • The control device may contain a discrete electronic circuit, an integrated circuit and/or a microprocessor, for example the central microprocessor, on which a suitable computer program is run. The control device may have separate memory elements, in particular for storing programs, for example for storing the self-cleaning program or at least a washing program. Alternatively, it may be provided that the memories of the control device are memory cells of a higher-level memory, for example of the memory assigned to the central microprocessor.
  • The self-cleaning program may be executed automatically on the basis of the signal generated as the detecting method is executed. For this purpose, the detecting device is connected for signal transmission to the control device, for example via electrical lines, in order for the signal to be transmitted to the control device. The control device is designed for picking up the signal and executing the self-cleaning program on this basis.
  • Preferably, a signal is sent to the user when automatic execution of the self-cleaning program is imminent, in order that the user does not load the dishwasher with new items to be washed before the self-cleaning program is executed.
  • The dishwasher may have a suitable operating element for starting the self-cleaning program manually. For example, if a signal that execution of the self-cleaning program is required is sent to the user by the indicating device, he can remove dishes that are in the dishwasher after the washing cycle, arrange the self-cleaning agent in the supply section and subsequently start the self-cleaning program. Manual starting of the self-cleaning program ensures that the self-cleaning program is executed at a point in time that is suitable in the operational-organizational sequence.
  • The self-cleaning liquid is preferably formed by a self-cleaning agent and clean water. For this purpose, it may be provided that the self-cleaning agent is arranged in a supply section; for supplying the self-cleaning liquid, the machine is filled with clean water and the clean water is circulated in order to form the self-cleaning liquid from the self-cleaning agent and the clean water.
  • For this purpose, the dishwasher has the supply section, for accommodating the self-cleaning agent, and a controllable clean-water inlet, for filling the dishwasher with clean water. The clean-water inlet may comprise, for example, a pipeline which is connected to a water supply system, and a controllable valve, by which the pipeline can be closed. For supplying the self-cleaning liquid, the control device then operates the clean-water inlet, in order to fill the dishwasher with clean water. After or during the filling, the control device operates the circulating pump, in order to circulate the clean water in such a way, in particular via the supply position, that the clean water along with the self-cleaning agent forms the self-cleaning liquid.
  • The supply section may be a location that is present in any case in the dishwasher, for example a tank screen. Furthermore, the supply section may be a location specifically intended for accommodating the self-cleaning agent.
  • The self-cleaning agent is in tablet form. In this case, the user also does not require any metering aids for metering the self-cleaning agent. Furthermore, he can place the self-cleaning agent on the tank screen, without the latter having to be designed in a special way for this, since the size of the holes in customary tank screens is smaller than the tablet.
  • The self-cleaning liquid is adapted to clear adhering remains of grime or the like from parts of the dishwasher, preferably at least one of the parts comprising the washing system and the interior machine space. The self-cleaning liquid is intended to keep the dishwasher clean, in particular in places that are difficult for a user to reach, and to prevent a build-up of grime in the washing systems. Preferably, a fresh fragrance is to flow through the interior space of the machine after cleaning, backing up the visual impression of a clean machine by a further sensory impression. The self-cleaning liquid may be adapted to counteract limescale deposits, in particular in their initial stages. This prevents the creation of relatively large lime spots or clogged washing nozzles. The self-cleaning liquid or the self-cleaning agent preferably contains at least one of the following active substances, with particular preference all of them:
    • cleaning agent
    • disinfectant
    • descaling agent
    • fragrance.
  • The dishwasher may have a tank for accommodating washing liquid. The tank is designed for accommodating washing liquid up to a predetermined level. For executing a washing program, in which items to be cleaned are treated with washing liquid, the tank may be filled with the washing liquid up to the predetermined level, at least some of the washing liquid being used for executing the washing program a number of times, and all the washing liquid being pumped away from the tank prior to the self-cleaning liquid being supplied.
  • For this purpose, a pump for pumping away the washing liquid may be provided. The pump for pumping away the washing liquid may be the same pump that is also used for pumping away the self-cleaning liquid, or a separate pump. Furthermore, the control device is designed for controlling the pump at the end of the washing program, with the result that at least some of the washing liquid remains in the dishwasher, and for controlling the pump prior to the self-cleaning liquid being supplied, in order for all the washing liquid to be pumped away.
  • The supply section preferably lies above the predetermined level in the tank. In this case, the self-cleaning agent may be arranged in the supply section once the washing program has ended and prior to the washing liquid being pumped away. This method offers the user maximum convenience and dependability. When there is an optical and/or acoustic signal from the indicating device after the last washing program, he can therefore remove the items to be washed from the machine, arrange the self-cleaning agent in the supply section, for example on the tank screen, and start the self-cleaning program by actuating the operating element.
  • The self-cleaning program may include a step "d) filling the dishwasher with washing liquid once the self-cleaning liquid has been pumped away from the dishwasher according to step c)".
  • Step d) makes the dishwasher ready to execute washing programs immediately after the self-cleaning program is ended. This minimizes waiting times for a user. It may be provided that the indicating device indicates an end of the self-cleaning program to the user. For example, it may be provided that the optical signal of the indicating device is emitted up to the end of the self-cleaning program. In this way, the end of the self-cleaning program is indicated to the user by the optical signal "going out". Furthermore, it may be provided that a display shows a plain-text message indicating the end of the self-cleaning program.
  • BRIEF DESCRIPTION OF THE DRAWINGS
    • Figure 1 shows an embodiment of a dishwasher according to the invention;
    • Figure 2 shows the dishwasher from Figure 1 with self-cleaning liquid supplied;
    • Figure 3 schematically shows an embodiment of a detecting device according to the invention;
    • Figure 4 schematically shows parts of an embodiment of a dishwasher according to the invention.
    DETAILED DESCRIPTION
  • Figure 1 and Figure 2 show a dishwasher 2 in the form of a programmable machine for commercial use, with a detecting device 4 for sensing at least one operating condition which requires self-cleaning of the dishwasher 22, the detecting device 4 emitting a signal on this basis. The detecting device 4 is connected for signal transmission to an indicating device 6, here by electrical lines 26. On the basis of this signal, the indicating device 6 outputs for a user an optical and acoustic signal, which informs the user of the requirement for self-cleaning of the dishwasher 2. The dishwasher 2 also has a control device 8 for executing a self-cleaning program.
  • The indicating device 6 in Figure 1 and Figure 2 has a lamp 10, which is identified by an explanatory text 12 (for instance "self-cleaning") or a corresponding pictogram. The indicating device 6 also has a buzzer 14, which is activated by the signal of the detecting device 4. Furthermore, the indicating device 6 of the dishwasher 2 has a display 16, which can show a message 18 in plain text, for example "self-cleaning required" as an additional optical signal.
  • Figure 3 schematically shows, in a synoptic representation, an embodiment of the detecting device 4 in detail. The embodiment represented in Figure 3 serves for explaining a large number of possible ways of forming a detecting device, only a single one of which, or a combination of two of the possibilities represented, is preferably realized in practice.
  • The detecting device 4 has a real-time clock 20 and a memory 22, which stores a point in time of the last self-cleaning operation. The real-time clock 20 is connected to a time-memory device 24 by lines 26 for the transmission of a time signal. The control device 8 is connected for signal transmission to the time-memory device 24, in order to transmit a signal which signals the execution of the self-cleaning program to the time-memory device 24, which on this basis stores in the memory 22 a current time signal and consequently the point in time of the last self-cleaning operation. The real-time clock 20 is also connected for signal transmission to a calculating device 28, in order for a time signal to be transmitted to the calculating device 28, which calculates from the point in time of the last self-cleaning operation and the time signal of the real-time clock 20 a duration which has elapsed since the last self-cleaning operation.
  • A time comparator 30 is connected for signal transmission to a memory 32, in which a duration threshold value is stored. The time comparator 30 is also connected for signal transmission to the calculating device 28, in order for the duration which has elapsed since the last self-cleaning operation to be recorded. The time comparator 30 compares this with the duration threshold value and emits the signal when the duration which has elapsed since the last self-cleaning operation is equal to or greater than the duration threshold value.
  • The detecting device 4 in Figure 3 also has an elapsed-hour meter 34 and an elapsed-hour resetter 36, connected to the latter for signal transmission. The control device 8 is connected for signal transmission to the elapsed-hour resetter 36, in order to transmit a signal which signals the execution of the self-cleaning program to the elapsed-hour resetter 36, which resets the elapsed-hour meter 34 on this basis.
  • The elapsed-hour meter 34 and a memory 38 for storing an elapsed-hour threshold value are connected for signal transmission to an elapsed-hour comparator 40, in order for a meter reading of the elapsed-hour meter 34 or of the elapsed-hour threshold value to be transmitted. The elapsed-hour comparator 40 compares the meter reading with the elapsed-hour threshold value and emits the signal when the meter reading is equal to or greater than the elapsed-hour threshold value.
  • Furthermore, the detecting device 4 has a cycle meter 42, for counting washing program cycles, and a cycle resetter 44. The control device 8 is connected for signal transmission to the cycle resetter 44, in order to transmit a signal which signals the execution of the self-cleaning program to the cycle resetter 44, which resets the cycle meter 42 on this basis.
  • The cycle meter 42 and a memory 46 for storing a cycle threshold value are connected for signal transmission to a cycle comparator 48, in order for a meter reading of the cycle meter 42 or the cycle threshold value to be transmitted. The cycle comparator 48 compares the meter reading with a cycle threshold value and emits the signal when the meter reading is equal to or greater than the cycle threshold value.
  • Finally, the detecting device 4 comprises a sensor 50 or alternatively a sensor 52 (represented by dotted lines) for sensing a degree of contamination of the dishwasher 2, which sensors are connected for signal transmission to a contamination comparator 54, in order for a current value of a variable characterizing the degree of contamination of the relevant sensor 50, 52 to be respectively transmitted. The detecting device 4 also has a memory 56 for storing a contamination threshold value which is adapted to the sensor 50, 52, which memory is connected for signal transmission to the contamination comparator 54, in order for the contamination threshold value to be transmitted. The contamination comparator 54 compares the current value of the degree of contamination of the sensor 50, 52 with the contamination threshold value and emits the signal when the current value of the degree of contamination of the sensor 50, 52 is equal to or greater than the contamination threshold value.
  • Signal outputs of the time comparator 30, of the elapsed-hour comparator 40, of the cycle comparator 48 and of the contamination comparator 54, which supply the signal of the relevant comparator 30, 40, 48, 54, are connected to a logic device 62, which picks up the signals of the comparators 30, 40, 48, 54, subjects them to logic operations and feeds them to a common output 64 of the detecting device 4. In Figure 3, the logic device 62 is formed by an OR gate, which carries out an OR operation on the signals of the individual comparators 30, 40, 48, 54.
  • In an embodiment of the dishwasher 2 represented in Figure 4, a detecting device 4 is connected for signal transmission to a control device 8, here by way of example by electrical lines 26, in order for the signal of the detecting device 4 to be transmitted to the control device 8. The control device 8 is designed for picking up the signal and executing the self-cleaning program on this basis. The execution of the self-cleaning program may take place after a predetermined waiting time, in which for example a user can remove dishes from the machine, or after completion of a washing program that is possibly in progress. The detecting device 4 is also connected to an indicating device 6, which outputs for a user a signal indicating the execution of the self-cleaning program.
  • The embodiment of a dishwasher 2 represented in Figure 1 and Figure 2 has an operating element 66 for manually starting the self-cleaning program controlled by the control device 8. In the self-cleaning program, firstly self-cleaning liquid 84 is supplied.
  • For this purpose, the dishwasher 2 has a supply section 68 for accommodating a self-cleaning agent 70. The supply section 68 is formed by a tank screen 72, which is arranged over a tank 74. The screen openings in the tank screen 72 are adapted for accommodating the self-cleaning agent 70 in tablet form.
  • The control device 8 is connected via electrical lines 26 to a controllable valve 76 as a clean-water inlet 77, which is arranged in a clean-water line 78, and controls said valve for filling the tank 74 with clean water 80. Arranged in the tank 74 is a circulating pump 82. After filling the tank 74, the control device 8 controls the circulating pump 82, connected to it for control, in order to circulate the clean water 80 in such a way that, with the self-cleaning agent 70 arranged on the tank screen 72, it forms the self-cleaning liquid 84. This is represented in Figure 2, some of the self-cleaning agent 70 (here in tablet form) already having dissolved.
  • The control device 8 is also designed to control the circulating pump 82 after formation of the self-cleaning liquid 84 for further circulating the self-cleaning liquid 84 in the dishwasher 2 and for cleaning parts of the same. The parts to be cleaned comprise the washing system 58, in particular a spray arm 86 and a pipeline 88 for feeding liquids to the spray arm 86, and also the inside wall 60 of the dishwasher 2.
  • For pumping away liquid located in the tank 74, a pump 90 is provided and connected to the control device 8 for control purposes (not represented). The control device 8 controls the pump 90 after the self-cleaning operation to pump away the self-cleaning liquid 84, out of the dishwasher 2.
  • The tank 74 is also intended for accommodating washing liquid 92 up to a predetermined level 94, the supply section 68 lying above the predetermined level 94 in the tank 74. As represented in Figure 1, the tank screen 72 is arranged above the predetermined level 94 of the washing liquid 92.
  • The dishwasher 2 represented in Figures 1 and 2 has as a controllable inlet 96 for washing liquid 92 the controllable valve 76 in the clean-water line 78 and a controllable valve 98 in a dishwashing agent feed line 100. The control device 8 is designed for supplying washing liquid 92 in the tank 74, to control the valve 76 in the clean-water line 78 and thereby feed clean water 80 into the tank 74 and to control the valve 78 in the dishwashing agent feed line 100, for metering dishwashing agent 102 out of a dishwashing agent reservoir 104 to the clean water 80.
  • The washing programs executed by the control device 8 are designed such that, at the end of a washing program in which items to be washed 106 are treated with the washing liquid 92 in a basket 108, at least some of the washing liquid 92 remains in the dishwasher 2, in order to save water and energy. Provided for pumping away the washing liquid 92 is the pump 90, with which the self-cleaning liquid 84 is also pumped away from the tank 74.
  • If a self-cleaning operation is required, the user waits until the end of the washing program and then places the self-cleaning agent 70 on the tank screen 72. This situation is represented in Figure 1. The control device 8 of the dishwasher 2 represented in Figure 1 and Figure 2 is designed to control the pump 90 when the operating element 66 is actuated to pump away all the washing liquid 92 before the self-cleaning liquid 84 is supplied, and to subsequently control the self-cleaning program.
  • The control device 8 is also designed to control the controllable inlet 26 for washing liquid 92, in order to fill the tank 74 up to the predetermined level 94 with washing liquid 92 once the self-cleaning liquid 84 has been pumped away.
  • A preferred embodiment of a self-cleaning program includes the following steps:
    • 0. The self-cleaning agent (tablet/powder/liquid) is supplied in a metered manner.
    • 1. The washing liquid is pumped away from the tank 74.
    • 2. The dishwasher 2 is filled with clean water 80, without dishwashing agent 102 being supplied in a metered manner.
    • 3. The clean water 80 is circulated through the washing system 58, which also serves for cleaning items to be washed 106. In this case, the self-cleaning agent dissolves (along with the clean water, the self-cleaning liquid forms) and cleans the interior space of the machine and also the washing system 58.
    • 4. The self-cleaning liquid is pumped away.
    • 5. The dishwasher 2 is filled as in "normal operation", with dishwashing agent 102 being supplied in a metered manner.

    Claims (20)

    1. A dishwasher (2), comprising:
      a detecting device (4) for sensing at least one condition indicative of a need for a self-cleaning of the dishwasher, the detecting device (4) emitting a signal in this respect; and a control device (8) for executing a self-cleaning program, the control device (8) operable for controlling a) a device for supplying self-cleaning liquid, b) a circulating pump (82) for carrying out a self- cleaning operation by circulating the self-cleaning liquid (84) in the dishwasher (2), for cleaning parts of the same, and c) a device for emptying the self-cleaning liquid (84) from the dishwasher (2) following the self-cleaning operation according to step b),
      characterized by
      a supply section (68), for accommodating a self- cleaning agent (70) in tablet form, and a controllable clean-water inlet (77), for filling the dishwasher (2) with clean water (80), the control device (8), for the purpose of supplying the self-cleaning liquid (84), operating the clean-water inlet (77), in order to fill the dishwasher with clean water (80), and operating the circulating pump (82), in order to circulate the clean water (80) such that the latter, along with the self-cleaning agent (70), forms the self- cleaning liquid (84); and by
      a tank (74) for accommodating washing liquid (92) up to a predetermined level (94), the supply section (68) being located above the predetermined level (94) in the tank (74).
    2. The dishwasher (2) according to Claim 1, wherein the device for emptying the self-cleaning liquid (84) from the dishwasher (2) following the self-cleaning operation according to step b) is a pump (90).
    3. The dishwasher (2) according to Claim 1 or 2, wherein the operation of emptying the self-cleaning liquid (84) from the dishwasher (2) following the self-cleaning operation takes place by gravitational force.
    4. The dishwasher (2) according to one of the preceding claims, further comprising an indicating device (6) for picking up the signal of the detecting device (4), the indicating device (6), on the basis of this signal, emitting an optical and/or acoustic signal for a user, who is thus alerted that self-cleaning of the dishwasher (2) is required; and
      further comprising an operating element (66) for manually starting the self-cleaning program.
    5. The dishwasher (2) according to one of the preceding claims, further comprising:
      a real-time clock (20) and a memory (22) which stores the point in time of the last self-cleaning operation; a calculating device (28) which, from the point in time of the last self-cleaning operation and a time signal from the real-time clock (20), calculates a duration which has elapsed since the last self-cleaning operation; a memory (24) for storing a duration threshold value; and a time comparator (30) by means of which the duration which has elapsed since the last self-cleaning operation is compared with the duration threshold value and the signal is emitted when the duration which has elapsed since the last self-cleaning operation is equal to or greater than the duration threshold value.
    6. The dishwasher according to one of the preceding claims, further comprising:
      an elapsed-hour meter (34) and an elapsed-hour resetter (36) which resets the elapsed-hour meter (34) as the self-cleaning program is executed; a memory (38) for storing an elapsed-hour threshold value; and an elapsed-hour comparator (40) by means of which a current value of the elapsed-hour meter (34) is compared with the elapsed-hour threshold value and the signal is emitted when the current value of the elapsed-hour meter (34) is equal to or greater than the elapsed-hour threshold value.
    7. The dishwasher (2) according to one of the preceding claims; further comprising:
      the detecting device (4) has: a cycle meter (42), for counting washing-program cycles, and a cycle resetter (44) which resets the cycle meter as the self- cleaning program is executed; a memory (46) for storing a cycle threshold value; and a cycle comparator (48) by means of which a current value of the cycle meter (42) is compared with a cycle threshold value and
      the signal is emitted when the current value of the cycle meter is equal to or greater than the cycle threshold value.
    8. The dishwasher (2) according to one of the preceding claims, further comprising at least one sensor (50) for sensing the degree of contamination of the dishwasher; a memory (56) for storing a contamination threshold value; and a contamination comparator (54) by means of which a current value of the degree of contamination is compared with the contamination threshold value and the signal is emitted when the current value of the degree of contamination is equal to or greater than the contamination threshold value.
    9. The dishwasher (2) according to one of the preceding claims, wherein the detecting device (4) is connected for signal transmission to the control device (8), in order for the signal to be transmitted to the control device (8), and in that the control device (8) is designed for picking up the signal and executing the self-cleaning program on this basis.
    10. The dishwasher (2) according to one of the preceding claims, further comprising an operating element (66) for manually causing the control device to start the self-cleaning program.
    11. The dishwasher (2) according to one of the preceding claims, wherein a pump (90) is provided for pumping away washing liquid (92), and in that the control device (8) is designed for controlling the pump (90) at the end of a washing program, in which items which are to be washed are treated with the washing liquid (92), with the result that at least some of the washing liquid (92) normally- remains in the dishwasher (2), and for controlling the pump (90) such that substantially all the washing liquid (92) is pumped away prior to the self-cleaning liquid (84) being supplied.
    12. The dishwasher (2) according to one of the preceding claims, further comprising a controllable inlet (96) for washing liquid (92), and in that the control device (8) is configured for controlling the inlet (96) in order for the dishwasher (2) to be filled with washing liquid (92) following removal of the self-cleaning liquid (84) from the dishwasher (2).
    13. A method of operating a dishwasher (2), characterized by a detecting method that checks whether at least one predetermined condition indicative of need for self-cleaning of the dishwasher (2) is present, a signal being emitted if the at least one predetermined condition is present; and a self-cleaning program that has the following steps: a) supplying self-cleaning liquid (84); b) circulating the self-cleaning liquid (84) in the dishwasher (2), for cleaning parts of the dishwasher (2); c) removing the self-cleaning liquid (84) from the dishwasher (2) following the self-cleaning operation according to step b),
      characterized in that
      a self-cleaning agent (70) supplied in tablet form, is arranged in a supply section (68) and, for the purpose of supplying the self-cleaning liquid (84), the machine is filled with clean water (80) and the clean water (80) is circulated via the supply section (68) in order for the self- cleaning liquid (84) to be formed from the self-cleaning agent (70) and the clean water (80); and in that
      in order to execute a washing program in which dishes are treated with washing liquid (92), a tank (74) is filled up to a predetermined level (94) with the washing liquid (92), in that at least some of the washing liquid (92) is used for executing the washing program a number of times, and in that all the washing liquid (92) is pumped away from the tank (74) prior to the self-cleaning liquid (84) being supplied; and in that
      the supply section (68) is located above the predetermined level (94) of the washing liquid (92), and in that the self-cleaning agent (70) is arranged in the supply section (68) once the washing program has ended and prior to the washing liquid (92) being pumped away.
    14. The method according to Claim 13, wherein the signal emitted during the course of the detecting method is picked up by an indicating device (6), and in that, on this basis, the indicating device (6) emits an optical and/or acoustic signal for a user.
    15. The method according to Claim 13 or 14, wherein a duration that has elapsed since the last self-cleaning operation is determined during the course of the detecting method, and in that the signal is emitted when this duration is greater than a pre-stored duration threshold value.
    16. The method according to Claim 13 to 15, wherein a number of hours elapsed since the last self-cleaning operation is sensed during the course of the detecting method, and in that the signal is emitted when the number of hours elapsed is greater than a pre-stored elapsed-hour threshold value.
    17. The method according to one of the claims 13 to 16, wherein a number of washing cycles since the last self-cleaning operation is counted during the course of the detecting method, and in that the signal is emitted when the number of washing cycles is greater than a pre-stored cycle threshold value.
    18. The method according to one of the claims 13 to 17, wherein the degree of contamination of the dishwasher (2) is sensed during the course of the detecting method, and the signal is emitted when the degree of contamination is greater than a predetermined contamination threshold value.
    19. The method according to one of the claims 13 to 19, wherein the self-cleaning program contains the following step: d) filling the dishwasher (2) with washing liquid (92) once the self-cleaning liquid (84) has been pumped away from the dishwasher (2) according to step c).
    20. The method according to one of the claims 13 to 20, wherein the self-cleaning program is executed automatically on account of the signal produced during the course of the detecting method.
    EP20050762207 2004-06-22 2005-06-17 Dishwasher and operating method for a dishwasher Active EP1773170B1 (en)

    Priority Applications (2)

    Application Number Priority Date Filing Date Title
    DE200410030013 DE102004030013A1 (en) 2004-06-22 2004-06-22 Dishwasher and operating method for a dishwasher
    PCT/US2005/021849 WO2006002123A1 (en) 2004-06-22 2005-06-17 Dishwasher and operating method for a dishwasher

    Publications (2)

    Publication Number Publication Date
    EP1773170A1 EP1773170A1 (en) 2007-04-18
    EP1773170B1 true EP1773170B1 (en) 2010-06-16

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    US (1) US20080308127A1 (en)
    EP (1) EP1773170B1 (en)
    AT (1) AT471105T (en)
    BR (1) BRPI0512285A (en)
    CA (1) CA2571077C (en)
    DE (2) DE102004030013A1 (en)
    WO (1) WO2006002123A1 (en)

    Families Citing this family (19)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP2120669B1 (en) * 2006-12-26 2012-03-28 Arçelik Anonim Sirketi Dishwasher with temperature increase for hygienic environment
    US8157920B2 (en) * 2007-12-12 2012-04-17 Electrolux Home Products, Inc. Control device for a dishwasher appliance and associated method
    DE102008015798B4 (en) * 2008-03-26 2015-06-18 Meiko Maschinenbau Gmbh & Co. Kg Heat recovery unit with self-cleaning
    DE102008040650A1 (en) * 2008-07-23 2010-01-28 BSH Bosch und Siemens Hausgeräte GmbH Flushing process for a water-conducting household appliance
    DE102008040651B3 (en) * 2008-07-23 2010-04-15 BSH Bosch und Siemens Hausgeräte GmbH Rinsing method for a water-conducting domestic appliance, in particular a dishwasher
    DE102008040647A1 (en) * 2008-07-23 2010-01-28 BSH Bosch und Siemens Hausgeräte GmbH Water-conducting household appliance, in particular dishwashing or washing machine
    US20110126861A1 (en) * 2009-08-24 2011-06-02 Electrolux Professional Spa AND Ecolab, Inc. Descaling arrangement for a dishwasher, and associated apparatus and method
    DE202010004284U1 (en) 2010-03-27 2010-07-01 Gealan Fenster-Systeme Gmbh Anti-intrusion device for prying open single- or double-winged, inward-rising windows
    US9649005B2 (en) * 2010-11-16 2017-05-16 Whirpool Corporation Method to remove fatty soils in a dishwasher
    US20120144871A1 (en) * 2010-12-14 2012-06-14 Whirlpool Corporation Laundry treating appliance with biofilm treating cycle
    US8844082B2 (en) 2010-12-14 2014-09-30 Whirlpool Corporation Laundry treating appliance with biofilm treating cycle
    CA2859358A1 (en) 2011-12-13 2013-06-20 Ecolab Usa Inc. Dishmachine
    WO2014125706A1 (en) * 2013-02-13 2014-08-21 オリンパスメディカルシステムズ株式会社 Endoscope washing and disinfecting device
    US9492054B2 (en) * 2014-10-02 2016-11-15 Frederick Keiner Washing machine descaler introduction apparatus
    KR20160084210A (en) * 2015-01-05 2016-07-13 엘지전자 주식회사 Method for controlling washing machine
    KR20170082031A (en) * 2016-01-05 2017-07-13 엘지전자 주식회사 Dish washer and controlling method thereof
    DE102017212319A1 (en) * 2017-07-19 2019-01-24 BSH Hausgeräte GmbH Household dishwasher and method for operating a household dishwasher
    GB2567693A (en) * 2017-10-23 2019-04-24 Selden Res Ltd A chemical dosing system
    EP3539440A1 (en) * 2018-03-15 2019-09-18 Vestel Elektronik Sanayi ve Ticaret A.S. System for unclogging a drain pipe of a washing apparatus

    Family Cites Families (25)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US1730348A (en) * 1925-09-14 1929-10-08 Blakeslee & Co G S Washing machine
    US2235885A (en) * 1937-07-29 1941-03-25 American Glass Sterilizer Corp Glassware washer and sterilizer
    US2270595A (en) * 1939-01-06 1942-01-20 Joseph D Lewis Lawn sprinkler
    US3504390A (en) * 1968-05-08 1970-04-07 Cornell Wing Apparatus for washing cartons
    US3789860A (en) * 1971-11-05 1974-02-05 Hobart Mfg Co Method and apparatus for treating dishwasher discharge
    CH562641A5 (en) * 1973-03-13 1975-06-13 Niro Plan Ag
    US4070204A (en) * 1976-01-22 1978-01-24 General Electric Company Low-energy dishwasher
    US4066472A (en) * 1976-11-22 1978-01-03 Adamation, Inc. Scraper nozzle for warewashing machine
    US4231806A (en) * 1978-08-25 1980-11-04 Caterpillar Tractor Co. Fluid barrier means for parts washer apparatus
    US4313451A (en) * 1979-09-14 1982-02-02 G. S. Blakeslee & Company Apparatus for washing soiled articles
    US4532893A (en) * 1982-09-30 1985-08-06 Cummins Engine Company, Inc. Electronically controlled fuel pump
    US4509543A (en) * 1983-09-12 1985-04-09 Beta Technology, Inc. Industrial dishwasher monitor/controller with speech capability
    US4561904A (en) * 1984-09-21 1985-12-31 Hobart Corporation Control system and method of controlling a dishwashing machine
    DE3441222A1 (en) * 1984-11-10 1986-05-15 Winterhalter Kg Karl Method for controlling a commercial cleaning machine
    US4788992A (en) * 1987-04-28 1988-12-06 Lewis Corporation Ultrasonic strip cleaning apparatus
    BR9408091A (en) * 1993-11-20 1997-08-12 Unilever Nv A process for machine dishwashing
    DE4413870C2 (en) * 1994-04-21 1997-07-10 Aeg Hausgeraete Gmbh Dishwasher with a metering device
    US5497798A (en) * 1994-11-14 1996-03-12 Insinger Machine Company Conveyor dishwasher
    JP3456066B2 (en) * 1995-09-19 2003-10-14 三菱電機株式会社 Arc control device
    FR2751627B1 (en) * 1996-09-24 1998-10-16 Remericq Maurice Installation for temporary storage of articles and method for controlling the operation of the installation
    US5897292A (en) * 1997-10-07 1999-04-27 The Procter & Gamble Company Apparatus and method for forming arrays of articles for packaging
    US6354481B1 (en) * 1999-02-18 2002-03-12 Speedline Technologies, Inc. Compact reflow and cleaning apparatus
    US6551414B2 (en) * 2001-01-19 2003-04-22 U.S. Chemical Corporation Automatic system and method for removing mineral deposits from a dishwasher
    US6632291B2 (en) * 2001-03-23 2003-10-14 Ecolab Inc. Methods and compositions for cleaning, rinsing, and antimicrobial treatment of medical equipment
    JP3565508B2 (en) * 2001-04-04 2004-09-15 シャープ株式会社 Dishwasher

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    WO2006002123A1 (en) 2006-01-05
    DE102004030013A1 (en) 2006-01-12
    BRPI0512285A (en) 2008-03-18
    EP1773170A1 (en) 2007-04-18
    DE602005021885D1 (en) 2010-07-29
    CA2571077A1 (en) 2006-01-05
    AT471105T (en) 2010-07-15
    CA2571077C (en) 2009-12-15
    US20080308127A1 (en) 2008-12-18

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